{"instruction": "You are an expert in named entity recognition. Please extract entities that match the schema definition from the input. Return an empty list if the entity type does not exist. Please respond in the format of a JSON string.", "schema": ["Chemical"], "input": "These worms use vertebrates ( marine mammals , fish - eating birds and waterfowl ) as definitive hosts and invertebrates ( amphipods , decapods and euphausiids ) as intermediate hosts to complete their life cycle ."}
{"Chemical": []}